Fluorescent - Emits electromagnetic radiation, especially of visible light, stimulated in a substance by the absorption of incident radiation and persisting only as long as the stimulating radiation is continued. Translation: Light of one spectrum hits it and it produces light in another spectrum.

Fluorescent paint translates ultraviolet light into visible light. It has the real life effect of making things look bright or 'neon.' Often used in laundry detergent to "make your whites, whiter".